Wenshuo KANG, Xiaojie GUO, Kai ZOU, Xiangyong ZHAO, Zhiyong ZHOU, Ruihong LIANG. Enhanced Resistivity Induced by the Second Phase with Layered Structure in BiFeO3-BaTiO3 Ceramics [J]. Journal of Inorganic Materials, 2023, 38(12): 1420
- Journal of Inorganic Materials
- Vol. 38, Issue 12, 1420 (2023)
1. XRD patterns of sintered (1−x )BF-x BT samples in the range of 2θ =15°-80° (a) and the magnified image at 2θ =39° (b)
2. Backscattered electron images of the cross-section for (1−x )BF-x BT ceramics (a-d), polished surface image for x =0.10 composition (e), and EDS mapping of Bi (f) and Fe (g)
3. DC resistivity versus temperature of (1−x )BF-x BT ceramics (a), Nyquist plots at 300 ℃ (b), and grain boundary resistivity obtained from fitting Cole-Cole plots of x =0.10 composition (c)
4. Modulus plots versus temperature for x =0.10 composition (a), and capacitance values extracted from modulus peaks at different temperatures (b)
5. TEM image (a), selected-area electron diffraction (b) and high-resolution TEM image (c) at [111] of second phase, and high-angle annular dark-field images in [111] zone axis (d, e) with illustration in (e) showing intensity plot of atoms in green box
6. Resistivity simulation of the BF-BT composite ceramic at 300 ℃ (a), schematic diagram describing carrier migration (b), and Schottky barrier model (c)
7. Backscatter morphologies of the polished 0.70BF-0.30BT pure component sample (a) and the sample modified with the second phase (b), resistivities of two samples versus temperature (c), and summary results of the resistivities of 0.70BF-0.30BT at 300 ℃ reported in the literatures (d)
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